The number displayed in that manner...doesn't reflect RAM installed.
It's a net number derived by taking the RAM installed...and subtracting the amount of RAM used for onboard video and a few other Windows functions/processes.
You can see an accurate display of the RAM installed in the BIOS...or by running msinfo32 and looking at the Total Physical Memory line in the right-hand screen.
You can go into the BIOS and change the amount of RAM you are devoting to onboard video. See second sentence under About Integrated Video Memory at http://h10025.www1.hp.com/ewfrf/wc/documen...519&lang=en